From living on that part of the country and taking vacations starting as a child in the area you are interested in I think that Desert Hawk's post was great and can only add one or two things.
He mentioned Palo Duro Canyon State Park it is a great park with RV camping DOWN in the canyon! It is the second largest canyon in the USA and would also recommend the outdoor show
Texas and the cowboy chuckwagon dinner that is in canyon good memories.
I can still remember my first ride on the
Durango Silverton Railroad and my first time walking down and through the cliff dwellings in
Mesa Verde